Serving tray



FIG. 1 is a top plan view of a serving tray showing my new design:

FIG. 2 is a bottom view thereof:

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a front perspective view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines showing is included for the purpose of illustrating environment of the design and forms no part of the claimed design. 

The ornamental design for a serving tray, as shown and described. 